Adult bed bugs, in general, are:
- about the size of an apple seed (5-7 mm or 3/16 – 1/4 inch long);
- long and brown, with a flat, oval-shaped body (if not fed recently);
- balloon-like, reddish-brown, and more elongated (if fed recently);
- a “true bug” (characteristics of true bugs include a beak with three segments; antenna that have four parts; wings that are not used for flying; and short, golden-colored hairs); and
- smelly, with a “musty-sweetish” odor produced through glands on the lower side of the body.
Young bed bugs (also called nymphs), in general, are:
- smaller, translucent or whitish-yellow in color; and
- if not recently fed, can be nearly invisible to the naked eye because of coloring and size.
Bed bug eggs, in general, are:
- tiny, the size of a pinhead;
- pearl-white in color; and
- marked by an eye spot if more than five days old.
By: Environmental Protection Agency (EPA)